KairosDB vs MonetDB: What are the differences?
Developers describe KairosDB as "Fast Time Series Database on Cassandra". KairosDB is a fast distributed scalable time series database written on top of Cassandra. On the other hand, MonetDB is detailed as "Column-store database". MonetDB innovates at all layers of a DBMS, e.g. a storage model based on vertical fragmentation, a modern CPU-tuned query execution architecture, automatic and self-tuning indexes, run-time query optimization, and a modular software architecture.
KairosDB and MonetDB can be categorized as "Databases" tools.
KairosDB is an open source tool with 1.46K GitHub stars and 302 GitHub forks. Here's a link to KairosDB's open source repository on GitHub.